Ionized-chamber device.



C. D. BABCOCK.

IONIZED CHAMBER DEVICE.

APPLICATION FILED ocT. 24, |916.Y

Patented Apr. 17, 1917.

ran saires naar onirica.

CLIFFORD DUDLEY BAIBCOCK, OIF NEW YORK, N. Y., ASSIGNOR 0F ONE-HALF TO JOHN NIEJLSOIT,V OF NEW YORK, N. Y.

romania-CHAMBER DEVICE.

ing or indicating electrical currents, or variations of. direction or steadiness of` flow thereof. j The main objects of my invention are to reduce the numberv of lead wires sealed through the walls `of the bulb, cylinder, or other envelop; to save the cost of the separate condenser commonly used in connection with such devices; \to provide means for varying the capacity `of the condenser; to provide 'a simple and efficient means for adjusting the distances between the elements within the envelop after lit has been pumped out yand sealed olf; and to reduce the number of pieces of apparatus necessary in the construction and installation of systems or-plants in which such devices may be used. Y

Various other important objects of my invention and advantages of my 'improved' construction-will be pointed out more particularly hereinafter in connection with the detailed description of one embodiment thereof. In the accompanying drawings,

Figure 1 is a central longitudinal section of a device embodying my invention, certain of the parts being shown slightly in perspective,and a wiring diagram illustrating a wireless receiving system in which the vdevice 'may be employed; and

- Fig. 2 is a transverse section on the line 2 2 'of Fig. 1.

`Merely for purpose-Spf illustration, II

have shown myv improved. device in connec- .tion with circuits similar 1n most respects to those illustrated in the De Forest Patent No. 879,532, granted February 18th, 1908.

x In this Wiring diagram, the elevated conductorVA has earth .connections at E and a l Specification of Letters Patent.

Patented Apr. 1'?, 1917( Application led October 24, 1916. Serial No. 127,335.

is connected through a telephone or other,A signal indicating device T and a battery B to one terminal of the filament. The other terminal of the filament is directly connected to one terminal of the secondary I2 of the transformer while the other terminal of the input electrode is inductively connected to the other terminal of said secondary.

I wish it particularly understood that this arrangement of circuits forms no portion ofmy invention and is shown and described'l merely to illustrate one system in which one form of my device' may be employed. Neither do I claim any novelty` in the particular construction or relativev arrangement of the three electrodes a, '6, and F.

As the important feature of my invention, Iv utilize a wall ofthe envelop or chamber as the.dielectric of a condenser which is connected in series with one of the electrodes within the chamber. In the specific form illustrated, the envelop is of tubular form and uniform in cross section for a material and preferably of an'eXternal diameter substantially equal to the internal diameter of the peripheral wall 10. It may be split lengthwise or otherwise designed so as to adapt it to slight variations in the diameter. of the envelop wall andv to allow of its being held in position by frictionfit."

Outside of the envelop wall, I provide a second sleeve 12 which is. also of metal or.-

other suitable conductingmaterial and of an internal diameter substantially equal to theexternal diameter of the envelop wall 10. This external sleeve or tube 12 .may be clamped or otherwise eectively secured to thenenvelop wall and may, if desired, be

ioiiv losl velop Wall.

The two sleeves, tubes or plates, 11 and 12 are thus separated by the thin envelop wall of insulating material and constitute an adjustable condenser. The inner plate or wall of the condenser is connected to the grid a by a lead wire 13 while the outer plate or wall is connected to the transformer. This condenser, formed by the inner and outer sleeves and the envelop wall, is thus in the circuit between the grid 'a and the transformer and permits the omission of the condenser C of the De Forest patent above referred to.

By means of this construction, the capacity of the condenser may be varied by varying the areas of the opposed surfaces of the two sleeves 11 and 12. This adjustment or variation may be secured by sliding the outer sleeve 12 lengthwise of the envelop wall or by giving the envelop or chamber a sudden jar in the direction o f its major axis, whereby the inner sleeve may be caused to slip endwise a limited distance within the envelop. -It will be noted that the inner sleeve is somewhat shorter than the cylindrical portion of the peripheral wall of the envelop to permit such endwise sliding.

Although the grid or input electrode a may be supportedfrom the stem or other part of the envelop, and may be connected to the inner sleeve or plate of the condenser by flexible lead wires, I preferably make Ithe leads comparatively stiff and utilize the sleeve as a direct support for the grid. By this arrangement, the grid may be placed in approximately the desired position in respect to the other electrodes before the en velop is pumped out and sealed, and after the pumping and sealing operations have been completed, the device may be connected in circuit by. flexible lead wires and may be given sudden jarsinl the direction of its major axis to slide the internal sleeve endwse in either direction, to varythe distance between'the input electrode a and the other electrodes, or to vary its position in respect to them.

The facility with which the relative positions of the electrodes may be adjusted after the device is sealed, and the facility with which the capacity of the condenser may be adjusted, enables me to secure, in a measure, ,the desired tuning and, in part, avoid the necessity for the use of the usual syntonizing devices. The presence of the relatively large mass of the inner sleeve 11 is in many cases an additional advantage, as the metal tends to preserve a more stable condition within the bulb and thereby increases the useful life thereof,

It is evident that the outer sleeve 12 may be in the form of a clamp secured to a suitable base so that the envelop will be carried by and preferably adjustable within said support. This will obviate the necessity for providing the usual threading .base and will permit the contacts for heating the filament to be made by lany other suitable means. The leads from the filament may merely eirtend through the wall of the envelop as is shown for the lead from the plate b.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. An ionized chamber device comprising a sealed vessel, an input electrode, an output electrode, an electrode adapted to be heated, a condenser having the spaced plates thereof upon opposite sides of and spaced by a wall of the vessel, and connections within said vessel between one of said electrodes and the inner plate.

2. An ionized chamber device including a sealed vessel, two electrodes inclosed within said vessel, means for heating one of'said electrodes, and a condenser including spaced plates upon opposite sides of a wall of the vessel, the plate within the vessel being connected to the other electrode. 3. An ionized chamber device including a sealed chamber, spaced condenser plates upon opposite sides of a wall of the chamber, and a plurality of electrodes Within the chamber, one of said electrodes being connected solely to the inner condenser plate.

4. An ionized chamber device including a tubular vessel, a conductor within said vessel closely adjacent to a Wall thereof, a separate conductor outside of said vessel and closely adjacent to said Wall opposite to said first mentioned conductor, an electrode within said .vessel and connected to said rst mentioned conductor, and a second electrode within' said vessel and having a lead eX- tending through the Wall of the vessel.

5. An ionized chamber device including a tubular vessel, a condenser plate Within said vessel closely adjacent to a, wall thereof, a separate condenser plate outside of said vessel and closely adjacent tosaid wall opposite to said first mentioned condenser plate, an 'electrode within said vessel andconnected to saidrst mentioned condenser plate, and a second electrode within said vessel and having a lead extending throughvthe wall of the vessel. Y

6. An ionized chamber device including a tubularvessel, a condenser plate Within said separate condenser'plate outside of said vessel and closely adjacent to said Wall opposite to said first mentioned condenser plate, an electrode within said vessel and connected to said first mentioned condenser plate, and a vessel closely adjacent to a wall thereof, a

' second electrode within said vessel and hav 130 i ing a lead extending through the wall of the 4 said chamber,

vessel, one of said plates being adjustable in its own plane in respect to the other;

7 An ionized? chamber device, including a sealed chamber, a pair of electrodes inclos'ed within said chamber, means for heating one of said electrodes, a third electrode within and a support for -said last mentioned Aelectrode having frictionalengagement with the wall of the chamber and adjustable to vary the position of said last mentioned electrode in two.

8. An ionized chamber device including a sealed vessel, an electrode inclosed therein respect to the other ,and having a lead extending through the wall thereof, a second electrode Within said vessel and in operative relationship to the first mentioned electrode, and a support for said second mentioned electrode bodily shiftable with said second mentioned electrode.

9. An ionized chamber device including a sealed vessel, an electrode inclosed therein and having a lead extending through the wall thereof, a second electrode within said k, vessel and in operative relationshipA to the first mentioned electrode, and a supportfor said second mentioned electrode bodily shiftable with said second mentioned electrode by a j jarring of the device. in the direction of the lpermissible movement of said support.

10. An ionized chamber device including a chamber, a sleeve having frictional en- I -gagement with the inner wall thereof and I plurality of electrodes within theA one of said electrodes being connected to the movable axially in respect thereto, an electrode having fixed relationship to the wall of said chamber, and a second electrode car- -ried by said sleeve.

11.V An ionized chamber` device including a chamber, a sleeve having frictional engagement with the inner wall thereof and movable axially in respect thereto, an electrode having fixed relationship to the Wall of said chamber, by said sleeve, said chamber and, together with-said first mentioned sleeve and the wall of the chamber, forming-a condenser.

12.' A ,combined ionized chamber device and condenser, comprising a chamber having a wall of dielectric material, condenser plates upon opposite surfaces of said wall, and a chamber,

inner plate of the condenser.

13. An ionized chamber device comprising a second electrode carried' and a second sleeve encirchng tric materiahplates upon opposite surfaces' to constitute a condenser, one l of said plates of said wall being adjustable to vary the area of opposed surfaces, a plurality of electrodes within said chamber, and meansfor ionizing the space between said electrodes.

15. A combined condenser and ionized p A75 peripheral wall, -a pair ofl chamber device, including a tubular vessel having a glass, sleeves concentric with said wall and spaced apart by said wall, an electrode withinsaid vessel, means for heating said electrode, and a second electrode within said vessel and operatively connected to the inner sleeve.

16. A combined condenser and ionizedv chamber device, including a tubular vessel having a glass peripheral wall, a pair of sleeves concentric with said wall and spaced apart by said wall, an electrode. within said vessel, means for heating said electrode, and

a second electrode within said vessel and operatively connected to the inner sleeve, v

one of said sleeves being` axially adjustable inV respect to the other. Y

' 17. A combined condenser and ionized chamber device, including'a tubular vessel `I having a glass peripheral wall, a pair of` sleeves concentric with said wall and spaced apart by said wall, an electrode within said .Y vessel, means for heating said electrodes, and i a second electrode within said vessel and operativelyl connected to the inner sleeve, said inner sleeve being adjustable axially to vary the relative positions of said electrodes.

18. An ionized chamber device, including a vessel having a plurality of -electrodes therein, a condenser including a pair Y-of plates upon opposite sides of a wall of said vessel, and connections between one of said electrodes and one of said plates.

Signed at New Yorkfinfthe county of New York and State of New York, this 20th day of ctobrer, A. D.y 1916.

,orirronn nnnijnrnarcocn. 

